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Method for producing propene ethylene by carbon-contained alkene

A technology of propylene ethylene and carbon olefins, applied in ethylene production, hydrocarbon cracking to hydrocarbon production, organic chemistry, etc., can solve problems such as low olefin yield, and achieve the effect of improving conversion rate and good technical effect

Active Publication Date: 2007-10-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is C in the prior art 4 ~C 8 Carbon-containing olefin mixture is converted to C 2 ~C 3 The problem of low yield of olefins, providing a new method for producing propylene and ethylene from carbon-containing olefins

Method used

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  • Method for producing propene ethylene by carbon-contained alkene
  • Method for producing propene ethylene by carbon-contained alkene

Examples

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Effect test

Embodiment 1

[0031] As shown in Figure 1, the carbon-containing olefin mixture composition (weight %) is: isobutene: 45%, isobutane: 55%. Adopt the technological process of the present invention, catalyst is the ZSM-5 molecular sieve that silicon-aluminum molar ratio is 200, and reaction weight hourly space velocity is 10 hours -1 , the reaction temperature is 450°C, the reaction pressure is 15KPa (absolute pressure), and the temperature behind the partial condenser 5 is 25°C. The pilot plant proves that the product in the following ratio will be obtained (relative to the olefin content of the raw material):

[0032] C 2 ~C 3 : 68.3%

[0033] Fuel gas: 0.08%

[0034] C 4 Above fraction: 31.6%

Embodiment 2

[0036] As shown in Figure 1, the composition of the carbon-containing olefin mixture is the same as in Example 1. Adopt the technological process of the present invention, catalyst is the ZSM-5 molecular sieve that silicon-aluminum molar ratio is 200, and reaction weight hourly space velocity is 80 hours -1 , temperature of reaction is 500 DEG C, and reaction pressure is 30KPa (absolute pressure), and the temperature behind partial condenser 5 is 45 DEG C, will obtain the product (weight %) of following ratio:

[0037] C 2 ~C 3 : 65.5%

[0038] Fuel gas: 0.07%

[0039] C 4 Above fraction: 34.4%

Embodiment 3

[0041] As shown in Figure 1, the composition of the carbon-containing olefin mixture is the same as in Example 1. Adopt the technological process of the present invention, catalyst is the ZSM-5 molecular sieve that silicon-aluminum molar ratio is 200, and reaction weight hourly space velocity is 30 hours -1 , temperature of reaction is 550 ℃, and reaction pressure is 50KPa (absolute pressure), and the temperature behind partial condenser 5 is 55 ℃, will obtain the product (weight %) of following ratio:

[0042] C 2 ~C 3 : 69.5%

[0043] Fuel gas: 0.1%

[0044] C 4Above fraction: 30.4%

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Abstract

A process for preparing propene or ethene from C-contained olefin includes such steps as heating raw material by heat exchange with cracked product, heating to reaction temp by heater, cracking reaction at 400-600 deg.C under 10-50 KPa, heat exchange between cracked product and raw material, condensing to separate out C5 or more fraction, compressing, and separating propene or ethene.

Description

technical field [0001] The invention relates to a method for producing propylene and ethylene from carbon-containing olefins. Background technique [0002] Propylene and ethylene are important basic organic chemical raw materials. Propylene is mainly used to produce PP, cumene, acrylonitrile, acrylic acid and many other products; ethylene is used to produce polyethylene (PE), polyvinyl chloride (PVC) and ethylene oxide / ethylene glycol (EO / EG), etc. The main raw material of organic chemical products. As important light olefins, the annual demand for propylene and ethylene keeps growing. Thermal cracking of hydrocarbons is still one of the main methods for producing ethylene, while the process for producing propylene can generally be summarized as a by-product process and a proprietary process. The by-product process mainly refers to propylene obtained by steam cracking and catalytic cracking ethylene units. Proprietary technology refers to t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C4/06C07C11/06C07C11/04
CPCY02P30/40
Inventor 甘永胜钱宏义何志沈伟严玲玲
Owner CHINA PETROLEUM & CHEM CORP
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